Tubing stripper



April 2l, l93ln C, BELL 1,801,995

TUBING STRI'PPER Filed July l5, 1926 2 Sheets-Sheetl l @.1 liilill IN VEN TOR.

BY @A ATTORNEY.

` April 21, 1931. c. ELL j I1,801,995

TUBING STRIPPER Filled July 15, 1926 2Sheets-Sheet 2 IN VEN TOR.

BY l' ATTORNEY.

Patented Apr. 21, 1931 PATENT OFFICE IVAN c. BELL, or

DALLAS, TEXAS, ASSIGNOR TO THE GUIBERSON CORPORATION, F

DALLAS, TEXAS, A CORPORATION 0F DELAWARE ATUBING. s'riuPPER Application mea July 15,

This invention relates to new and useful improvements in tubing strippers.

The object of the invention is to provide certain improvements over the tubing stripper shown in my co-pending application, Serial No. 741,772, which has matured in Pat.- ent No. 1,639,209.

An important object of the invention is to provide elastic contact or stripping memm' bers havingannular cavities or cellular portions arranged to compensate the distortion of the stripping ribs.

A further object of the invention is to provide duid inlets to the cavities adjacent the stripping ribs, whereby the cavities may fill with Huid and also whereby said fluid may be expelled or drained from said cavities.

Another object of the invention is to `break the joints between the semi-circular stripping members in such a'way as to prevent leakage radially or transversely from the tubing. A

A still further object of the invention is to simplify and strengthen the structure, reduce the number of parts, improve the design to facilitate manufacture and to make a more effective device.

A construction designed to carry out the invention will be hereinafterdescribed, together with other features of the invention.

The invention Will be more readily understood from a reading of the following specifcation and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:

Fig. 1 is a view partly in elevation and partly in section, showing an oil saver constructed in accordance with my invention,

Fig. 2 is a plan View of the same, Fig. 3 is a plan view of one of ping members, l

Fig. 4 is an elevation of the inner side of the same, and Fig. 5 is an under side view of said member.

the strip- Y j In the drawings the numeral 10 designates 1926. Serial N0. 122,635.

one of the complementary members or sections of a split housing, the other section being 11. These sections are approximately semi-circular in plan 'and also are substantially duplicates.

The section 10 has a lug 10 formed thereon and provided witlran ear 12 projecting beyond the face of the section; while the section 11 has lugs 11 spaced apart and formed with 'ears 13 projecting beyond the face of the section. The ear 12 enters between the ears 13 and a pintle 14 passing through said ears, hinges the sections together. The sections are equipped with opposite handle loops 15.

Each section has a reduced semi-circular pedestal portion 16 having an outwardly directed base flange 17 atits bottom on which it rests. rThe pedestal formed by the sections is adapted to stand in the casinghead (not shown) and to be secured in the usual manner.- The upper portion 18 of each section extends outwardly and overhangs the portion 16, said portion 18 terminating at its top in an upstanding marginal retaining flange 19. Equally spaced set screws 20 are threaded transversely through said flange.

Each section has a top plate 21 extending inwardly from its flange 19. The inner edge or face 22 of the plate is given a semi-circular shape to co-actwith the face of the other section in forming a central aperture or opening of such diameter as to permit the free vertical passage of the tubing and its couplings. The set screws 20 overhang the plate and are employed to fasten a sand cap, slip spider or other mounting.

Under the plate and above the pedestal portion 16, each section has a semi-circular cavity or socket 23 for snugly receiving the body of a semi-circular elastic stripping member 24. This member may be made of soft rubber or any'other elastic composition, suitable for the purpose. Each member has a concaved vertical groove or channel 24 having its upper edge bevel'led back, at 25, whereby the tubing en ages leaage.

and couplings may pass down between said members, without catching upon the upper edges thereof.

Each member 24 has a depending flexible apron 26, reduced in thickness toward its lower end, but terminating in a reinforcing bead 27. The inner radius of the pedestal is some greater than that of the face or edge 21 and thus the apron is surrounded by a space below the body of the member 24 and within the pedestal. This space is open to the fluid and the pressure of the latter is utilized to compress the apron about the tubing.

The channel 24 of the member 24 extends downwardly from the bevel 25 to an out Wardly curved lip 28 which is merged into the bead 27. This channel is broken by a pair of spaced circumferential grooves 29, whereby strip ing ribs 30 are formed at the upper part of t e member 24 opposite its body. The grooves will collect oil and greaseand thus seal the bore of the saver.

In order that the ribs may be more readily expanded and displaced, particularly in horizontal planes, a pair of concentrically and superposed ducts 31 are formed in the body, one in the horizontal plane of each rib. A third duct 32 is provided in the body outwardly of the others and relatively therebetween. These ducts are circular in cross-section, but any suitable shape may be employed. It is obvious that these ducts provide a ready expansion of the ribs, thus permitting a free passage of the couplings without disintegratlng and damagin said ribs. If the stripping and made of rubber, very member was soli little expandin of the ribs would be had, as the rubber coul not be compressed suiliciently to rmit the coupling to pass.

Thls structure is of much importance as it ermits the use of a stripping member wit an exceptionally long contact channel, which, however, owing to its flexible apron the tubing close enough to prevent The lower duct 31 has connection at each end with a port 33 extending to the bottom' of the body and open to the fiuidspace surrounding the apron 26. Other ports 34 connect the ends of theupper duct 31 with the ends of the'lower duct. Whatever uid enters the pedestal will also flow through the rts 33 and 34, thus filling the ducts 31. There also will be some seepage between the ends of the contact members 24. If this Huid is under pressure, it will tend toresist the expansion of the ribs 30 until expelled, thus assurin a close contact between said ribs and the tubln An expansion of the ribs will `force the uid out through the ports.

The adjoininfr faces of the sections 10 and 11 are finished at and the ends ofthe members' 24 are substantially flush therewith, so that these parts will contact when the sections are closed about a tubing. The member l0 has a lug 35 on its swinging end to which the ends of a fastening yoke36 are pivoted- This yoke has a gate screw 37 threaded longitudinally in its swinging end. The yoke is swung over a latch lug 39 on the section 11. The end of the screw is reduced to a point 38 and the lug 39 has a correspondingly shaped sump 40 for receiving the screwpoint.

If desired, the endsy of the stripping members 24 may project a little from the faces of the sections and after the yoke 36 has been closed the screw 37 may be turned to draw the sections closer together, thus compressing the contacting ends of the stripping members. Iny

order to reduce leakage between the contacting ends of the stripping members, each member has a vertical angular recess or seat 41 in its end, extending from the inner face'.

toward the ducts 31; while on its opposite end and correspondingly located, is a vertical angular rib 42 (Figs. 3, 4 and 5). When the sections are closed, the rib of each enters the recess of the other, thus. breaking the 'oints. The pedestal portion 16 of one or oth of the sections may be vertically grooved for receiving protruding packing strips 43, which extend from the base `iange 1? to the stripping member 24. These stripsprevent leakage between the portions 16 when the sections are closed.

The use of tubing oil savers being well understood in the art and the advantages and uses of the various parts of this device having been pointed out, a description of the operation is not deemed necessary. However, it is pointed out that it is not necessary to fasten the elastic stripping members in place as they fit tight enough in the sockets 23 to remain there. They are thus free from bolts and the like. The use of the ducts 31 and 32 enables a more compact and eiiicient stripping member. The function of the ducts 31 and 32 is to lend porosity to the stripping or contact members 24. This structure gives the members a cellular nature, whereby their resiliency is increased and also whereby they are more readily compressed.

Various changes in the size and shape of the different parts, as well as modifications and alterations, ma be made within the of the appende claims. at I claim, is:

1. A stripping member for an oil saver comprising a body formed with a concaved contact channel having an annular rib and rovided with an annular duct within the ody of the member alined with and surrounding the rib for compensatin the expansion of the rib, said body also aving a tubular -ilexible-extension forming an a ron depending from the central portion o the under lface thereof and having an outer face c f the length of the body and communicating with said duct.

2. A stripping member for an oil saver having a semicircular body provided with a lll" llt',

lln

vertical contact channel and an arcuate duct formed within the body to surround said channel and having a reduced passage extending to the lower face of the body, said member also having a flexible axial extension forming an apron depending from the central portion of its lower face with the outer surface of the apron communicating with said passage and its inner concaved channel alined with the channel of the body, the body having a flared portion atthe upper end of its contact channel and the apronhaving the lower end of its contact channel flared outwardly.

3. A stripping member for an oil saver having a semicircular body provided with a vertical central contact channel and an arcuate duct formed within the body to surround said channel and having a reduced passage extending to theunder side of the body, said member also having a iiexible apron of substantially the length of the body depending from its central portion at said under side at A one side of said passage and provided with a concaved channel alined with the channel of the body'.

4. In a, tubing stripper,

, members each comprlsing a radially extending head and a reduced flexible apron of substantially the length of the head and depending from the central portion therof, each member being provided with a central concave face forming a cylindrical channel, the

'head of each member being provided with an internal duct disposed circumferentially of the channel in alinement with a yielding contact face thereof, said ducts .forming an annular passage surrounding the channels of the members and communicating with a space at the outer face of said apron.

5. A stripping member for, an oil saver comprising a body provided with an elon- 'gatedaxialy contact channel having parallel annular bearing faces and also communieating internal ducts disposed circumferentially of the channel and alined with said faces, said member also having a reduced iiexihle apron depending from the central portion at substantially the length thereof and provided with a contact channel.

6. A stripping member for an oil saver comprising a body having a concaved contact channel rovided with an annular rib and a circum erential duct within the body inthe plane of the rib for compensating the expansion of the rib when the latter is displaced toward the opening, the body having an axial extension forming an apron through which the contact channel is continued.

In testimony whereof I ax my si nature. IVANGBLL.

a pair of stripping i the lower face of. the body for 

